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7.1.3 Insulation of the pump in refrigeration/air-conditioning systems
• The series SCX-DCX / SXM-DXM are suitable for use in refrigeration and air-
conditioning systems with temperatures of the fluid down to -20 °C.
• For applications in refrigeration and air-conditioning systems, Salmson-Clima-
Form diffusion-proof thermal insulation shells or other commercially-available
diffusion-proof thermal insulation materials must be used.
CAUTION! Risk of damage!
If the diffusion-proof insulation is applied by the customer, the pump hous-
ing may be insulated only up to the motor separation joint, so that the con-
densate drain openings remain open and allow the condensate accumulating
in the motor to flow out without obstruction (Fig. 8). Otherwise condensate
can accumulate in the motor, eventually causing an electrical defect.
7.2 Electrical connection
DANGER! Danger of death!
Improper electrical connections pose a risk of fatal injury due to electric
shock.
• Only allow the electrical connection to be made by an electrician approved
by the local electricity supplier and in accordance with the local regulations
in force.
• Before working on the pump, all poles of the power supply must be discon-
nected. Because voltages hazardous to persons persist for some time
(in capacitors), no work may be commenced on the module until 5 minutes
have elapsed (applies only to 1~ systems). Check to ensure all connections
(including potential-free contacts) are voltage-free.
CAUTION! Risk of damage!
If the wrong voltage is applied, the motor can be damaged!
• The current type and voltage of the mains connection must correspond to the
specifications on the name plate.
• The electrical connection must be established via a fixed connection line
equipped with a connector device or an all-pole switch with a contact opening
width of at least 3 mm.
• Mains-side fuse protection: 10 A, slow.
• Twin-head pumps: provide a separate mains connection cable and a separate
fuse on the mains side for both motors of the twin-head pump.
• The pumps can also be used without restriction in existing installations with and
without FI-protection switches. When dimensioning the FI-protection switch,
consider the number of pumps connected and their motor currents.
• When pumps are used in systems with water temperatures above 90°C, a suit-
able heat-resistant supply cable must be used.
• The supply cable is to be placed in such a way that under no circumstances can
it come into contact with the pipe and/or the pump and motor housing.
Installation and operating instructions Salmson SCX-DCX / SXM-DXM / SXS / NSB-S
English
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